Fig. 1: Fundamental Single-Line System.
a Simulation model and measurement sample. Ordinary grounded monopole transmitters (Tx) and receivers (Rx) were connected by waveform-selective metasurface lines to vary surface wave propagation and exhibit ultratransient responses at the same frequency. b Circuit configurations for C-based, L-based and parallel waveform-selective metasurfaces. Design parameters are seen in Supplementary Fig. S1, Supplementary Tables S1 and  S2. c Simplified equivalent circuit concept representing the two monopole antennas (Tx and Rx) connected by the waveform-selective metasurface line. d Simulated reflectance of the monopoles and normalized spectrum of a 50-ns sine wave pulse of 2.42 GHz. e Simulated transmittances between the antennas connected by (left) C-based, (center) L-based, and (right) parallel-type waveform-selective metasurface lines as a function of frequency with a 10 dBm input power. In the legend, CW represents a continuous wave as a sufficiently long pulse, while Pulse indicates a 50-ns-long short pulse (see Supplementary Fig. S6 for a comparison to an intermediate pulse of 300 ns). f The corresponding transient transmittances at 2.4 GHz in the (left) simulation and (right) measurement (also see Supplementary Fig. S6 for simulated transmittances with variation of pulse width). g Measured results using larger capacitances for the C-based waveform-selective metasurface line. C was increased from 1 to 1 μF and 100 μF.
